Velocity
The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of its speed and direction of motion (e.g. 7001166666666666666♠60 km/h to the north). Velocity is an important concept in kinematics, the branch of classical mechanics that describes the motion of bodies.
Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called "speed", being a coherent derived unit whose quantity is measured in the SI (metric) system as metres per second (m/s) or as the SI base unit of (m⋅s−1). For example, "5 metres per second" is a scalar (not a vector), whereas "5 metres per second east" is a vector.
If there is a change in speed, direction, or both, then the object has a changing velocity and is said to be undergoing an acceleration.
Constant velocity vs acceleration
To have a constant velocity, an object must have a constant speed in a constant direction. Constant direction constrains the object to motion in a straight path thus, a constant velocity means motion in a straight line at a constant speed.
Velocity (software development)
Velocity is a capacity planning tool sometimes used in Agile software development. Velocity tracking is the act of measuring said velocity. The velocity is calculated by counting the number of units of work completed in a certain interval, the length of which is determined at the start of the project.
Principle
The main idea behind velocity is to help teams estimate how much work they can complete in a given time period based on how quickly similar work was previously completed.
Terminology
The following terminology is used in velocity tracking.
Usage
To calculate velocity, a team first has to determine how many units of work each task is worth and the length of each interval. During development, the team has to keep track of completed tasks and, at the end of the interval, count the number of units of work completed during the interval. The team then writes down the calculated velocity in a chart or on a graph.
The first week provides little value, but is essential to provide a basis for comparison. Each week after that, the velocity tracking will provide better information as the team provides better estimates and becomes more used to the methodology.
Velocity (JavaScript library)
Velocity is a cross-platform JavaScript library designed to simplify the client-side scripting of website animation. Velocity is free, open-source software licensed under the MIT License. It is the most popular open source web animation engine.
Velocity's syntax is designed to make it easier to create complex animations for HTML and SVG elements. In addition to its workflow benefits, Velocity provides animation performance that is competitive with CSS-based animation. Velocity achieves its performance by maintaining an internal cache of animation states and minimizing "layout thrashing," the undesirable behavior that web browsers undergo when visually updating at a fast rate. Altogether, its workflow and performance benefits allow Velocity to be used for sophisticated animation programming that can be integrated into both web and mobile applications. Its broad browser and device support make it ideal for large enterprise distributions that must support low-powered devices.
Bagdad (film)
Bagdad is a 1949 adventure film starring Maureen O'Hara, Paul Hubschmid, and Vincent Price.
Plot
It tells the story of a Bedouin princess (Maureen O'Hara) who returns to Baghdad after being educated in England. She finds that her father has been murdered by a group of renegades. She is hosted by the Pasha (Vincent Price), the corrupt representative of the national government. She is also courted by Prince Hassan (Paul Hubschmid), who is falsely accused of the murder. The plot revolves around her attempts to bring the killer to justice while being courted by the Pasha.
The film was directed by Charles Lamont and included choreography by Lester Horton and Bella Lewitzky.
Production
The film was originally meant to star Yvonne de Carlo.
References
External links
Podcasts:
